What is the reason for the change in intensity of the colour of `CuSO_4` solution?

When Zn rod is dipped in CuSO_4 solutions, intensity of colour of CuSO_4 solution changes. Which is the metal that gets displaced here?

A student is doing an experiment in the laboratory using sodium. Suddenly, a piece of sodium falls into liquid ammonia. (a) What changes can you observe in liquid ammonia? (b) What is the reason for the change? (c) If the solution is kept for a long time it is changed into bronze colour. Why?

Keep two carbon rods immersed in copper sulphate solution. Then pass electricity through the solution. i) At which electrode does colour change occur-anode or cathode? ii) Is there any change in the blue colour of the copper sulphate solution? iii) Write down the chemical equations for the changes occurring here?

Keep two carbon rods immersed in copper sulphate solution.Then pass electricity through the solution: Is there any change in the blue colour of the copper sulphate solution?

What is obtained at the anode in the electrolysis of CuSO_4 ?

What are the changes that can be observed with the iron rod and the colour of copper sulphate solution?

When a Zn rod is dipped in CuSO_4 , the colour of the solution......

1 L of 1 MCuSO_(4) solution is electrolysed. After passing 2 F of electricity, molarity of CuSO_(4) solution will be

When we pass carbon dioxide gas through a green coloured solution of potassium manganate, the colour of solution changes to purple and a brown coloured solid gets precipitated. The green colour of potassium manganate solution also becomes purple when it is subjected to electrolysis using iron electrodes. In following reaction 3 K_2 underset("(green)")(MnO_4 + 2H_2 O + 4CO_2 to underset("(purple)")(2KmnO_4 )+MnO_2 + 4KHCO_3 the function of CO_2 is

When we pass carbon dioxide gas through a green coloured solution of potassium manganate, the colour of solution changes to purple and a brown coloured solid gets precipitated. The green colour of potassium manganate solution also becomes purple when it is subjected to electrolysis using iron electrodes. The change of colour from green to purple is due to